How can I use filters in SQLAlchemy queries?

How can I use filters in SQLAlchemy queries?

You can use the filter() method in SQLAlchemy to apply conditions to your queries. For example, session.query(User).filter(User.age > 30) retrieves users older than 30.

Can I combine multiple filters?

Yes, you can combine multiple filters using and_() or or_() from sqlalchemy. For instance, session.query(User).filter(and_(User.age > 30, User.name == 'John')).

What about using filters with relationships?

You can filter based on related models by using the relationship attribute. For example, session.query(Order).filter(Order.user.has(User.name == 'John')).

Are there any performance considerations?

Yes, using filters can impact performance. It's important to ensure that your database is properly indexed for the columns you are filtering on.